Once the phone enters fastboot mode, verify the connection with: fastboot devices
Open the Unlock App on your device and follow the on-screen prompts.
Ultimately, the beauty of Android lies in choice. The ZenFone 9’s vibrant development community ensures that you are not locked into a decaying software future. Whether you choose LineageOS or another ROM, you are giving your phone a second lease on life—and that is a win for both you and the environment.
While official support may end, LineageOS developers often provide updates for years, potentially keeping the current through Android 16 or 17
Visit the official Asus support page for the Zenfone 9 on your PC or phone. Download the (APK file). asus zenfone 9 lineage os
| ROM | Based On | Status | Unique Selling Point | | ------------------ | ----------------------- | ---------- | ---------------------------------------------------------- | | | Android 14 (Uvite) | Unofficial | Pixel‑like UI, beautiful wallpapers, minimal customization | | OmniROM | Android 13/14 | Unofficial | Lightweight, close to AOSP, known for stability | | /e/OS | Android (LineageOS fork) | Requested | Fully de‑Googled, privacy‑focused, with its own app store |
The Zenfone 9 occupies a unique niche in the smartphone market. Released in late 2022, it features a 5.9-inch display and the Qualcomm Snapdragon 8+ Gen 1 chip, making it one of the few truly compact flagships available. For many users, this hardware is the perfect canvas for a custom ROM like LineageOS, which could offer:
As of May 2026, the Asus ZenFone 9 (codename oddball ) has an Lineage OS build. This is crucial. "Official" means:
As a flagship device, the Zenfone 9 received only two years of major OS updates from ASUS. The software support window has now closed, making it increasingly vulnerable to security threats and software incompatibilities. While the hardware remains perfectly functional and powerful, you're now stuck on an older version of Android. This is precisely where LineageOS transforms your device. Here's what you gain by switching: Once the phone enters fastboot mode, verify the
(Replace the filename with the exact name of the LineageOS ZIP archive you downloaded).
LineageOS includes native privacy tools like Trust. This interface gives you deep control over app permissions, data sharing, and device security status. Prerequisites and Requirements
In your terminal window, flash the custom recovery components by executing the following commands sequentially: fastboot flash boot boot.img Use code with caution. fastboot flash vendor_boot vendor_boot.img Use code with caution.
If your computer recognizes the phone, it will output a unique serial number string. Step 5: Flash the LineageOS Recovery Whether you choose LineageOS or another ROM, you
Agree to the warnings. The phone will automatically restart, wipe its data, and boot up with an unlocked bootloader. Step 3: Prepare Your Computer Environment
Asus’s ZenUI is relatively lightweight compared to Samsung’s One UI or Xiaomi’s HyperOS, but it still comes with pre-installed apps and duplicate services. LineageOS offers a "pure" Android experience. It is the software Google meant to make, without the telemetry and tracking.
LineageOS turns the Zenfone 9 into the ultimate minimalist powerhouse. For the most up-to-date builds and specific troubleshooting, always check the official LineageOS Wiki Zenfone 9 XDA forums needed for the installation?
For enthusiasts looking to extend the life of their device, strip away bloatware, or reclaim privacy, LineageOS remains the gold standard. Here is everything you need to know about the current state, installation, and performance of LineageOS on the Asus Zenfone 9.